CA-96893: Remove metadata from xenopsd after a suspend.

Previously metadata was only removed after a shutdown.

Signed-off-by: John Else <john.else@citrix.com>
CA-96893: VM.remove now also removes the VmExtra persistent data.

Signed-off-by: John Else <john.else@citrix.com>
CA-107400: Make deletion of VmExtra in xenops VM.remove best-effort

Signed-off-by: John Else <john.else@citrix.com>
Merge pull request #1381 from akshayramani/Oliver/HFX-829

Oliver/HFX-829 : TAMPA fixes for Hotfix Oliver